diff --git a/tests/issues/test_issue_5640.c b/tests/issues/test_issue_5640.c
index 58cbff688..838f4dd3e 100644
--- a/tests/issues/test_issue_5640.c
+++ b/tests/issues/test_issue_5640.c
@@ -1,3 +1,5 @@
+// Tests issue: https://github.com/odin-lang/Odin/issues/5640
+
 #include <stdint.h>
 #include <stdbool.h>
 
diff --git a/tests/issues/test_issue_5640.odin b/tests/issues/test_issue_5640.odin
index d25c68976..efe638b3a 100644
--- a/tests/issues/test_issue_5640.odin
+++ b/tests/issues/test_issue_5640.odin
@@ -1,3 +1,5 @@
+// Tests issue: https://github.com/odin-lang/Odin/issues/5640
+
 package test_issues
 
 import "core:testing"